Chain saw.



G.MEYER. CHAIN SAW.

APPLICATION FILED NOV- 30.1917.

Patented July 23, 1918.

2 SHEET$-$HEET I Elwuamtov; George Newr G MEYER.

CHAIN SAW.

APPLICATION FILED NOV. 30, Hill. LQWfiQD Patented July 23,1918.

2 SHEETS-SHEET 2.

Ell

Specification or Letters Patent.

Patented July 23, 1918.

Application flied November 30, 191?. Serial No. acacia.

To all whom it may concern: a Be it mown that 1, Greece Mari-m, a citiaen of the United States, and resident of the city of Seattle, county of King, and State of Washington, have invented certain new "and useful Improvements in Chain Saws, of

which the followin is a specification.

My invention r ates to a sawing apparains in which the toothed members are made'in short sections and connected together to forma chain and in the means employed for driving said chain to cause it to cut. a

The-object of my invention is to produce a chain saw and a means for operating it, therehy providing an apparatus which will constitute a convenient, eficient and reliaahle means for cutting timber, the same heing intended for all uses to which the ordinary crosscut saw is usually put.

Figure 1 is a side view of a few links of my preferred type of construction of the saw.

Fig. 2 is a cross section through a link on the hue 2--2 of Fig, l.

Fig. 3 is a side view of a saw mounted upon a frame of very simple construction.

Fig. l shows an edge view of the saw actuating wheel and the mechanism for actuating said parts. I

ig. 5 shows a type of apparatus for mak g use of my saw to cut through a standing tree or a log. a

Fig. 6 is an elevation of the saw actuating apparatus shown in Fig. 5.

ln carrying out my invention form the hody of the saw as a number of links which are pivoted together to form an endless till tlli

chain and to each link attach a tooth section which may he renewed, or replaced by a section having a difi'erent form of tooth. Such chain is supported, guided and actuated hy special mechanisms which also form part of my invention.

The details of construction of the chain are shown in their preferred form in Figs. 11

and 2. The main link hody 1, may he made 1 of three lates secured together in face con tact, orout a single piece of metal, as desired or found most sultahle.

This part of the link when completed has two pockets 10, one at each end, which receive the ends of the connecting links-l2. The link bod 1 has a central flange 11 entendllling the ength of the side toward the teet y The linkhody does not have the cutting teeth formed directl thereon, hut upon a separate and remove le section 2 which has a central slot which snugly receives the flange ll of the link hody. The link body and tooth section are secured hy rivets 13,

which may he removed when it is desired to e i apply a new or diderent tooth section.

The inner corners of the tooth sections are cut away, as at '14, so that the chain may bend enough to pass about the guide and driving pulleys. At one of the outer corners it has a central flange or car 15 and at the other outer corner a complemental socket for the reception of the car 15 of the adjacent link', therehy insuring proper alinement hetween adjacent links. The end edges of the comhined or completed link outwardly from the ivot connections aloutagainst each otherw en the chain is straight ened out.

In Figs. 3 and l is shown a simple form of mechanism for using such a chain. This employs a frame, represented hy a bar 3 in one end of which is journaled an idler wheel 40 and in the other a driving wheel 4:. These two Wheels are, or may he, alike in construc- Bil tion, having a central core 42 and flanges 41-1 hetween which the saw fits snugly.

Tn the driver l, the flanges l]. are made of disks which are movable toward and from each other enough to grip the chain strongly hetween them or to permit it to run freely hetween them This may he most simply done hy making the disks ll of thin resilient plates and forcing these together upon the saw when the saw is to he driven. i

This gripping action may be conveniently secured by the application of rollers to the outer surfaces of the disks. Tn Fig. l l have shown levers 5 pivoted at 50 and carrying rollers 51. The ends of the levers 5, outwardly of the saw, are connected h a holt 52 which has a spring 53 hetween its head and one lever and has a hand adjusting wheel at screwing as a nut upon the bolt.

The pressure applied through the disks to the saw may thus be adjusted in amount and applied in a resilient manner so that slippage on the saw will occur if undue resistance he met hy' the saw. I thus provide a safety feature in the saw operating mecha nism. The disks thus constitute a friction clutch for driving the saw. For turning this friction clutch a crank 43 may he applied to the shaft of the disks, or a power llll drive may be connected thereto in any suitable manner.

In Figs. 5 and 61 have shown another manner of mounting the saw upon a frame for such use as cutting down trees. The frame 30, instead of being the simple straight frame of Fig. 3, is an arch-like or curved truss which carries several idler wheels 40, and whereby the saw 21 may cut deeply into a large log, the size depending upon size of the frame.

When used in cutting down trees,a pivot frame like that of Fig. 6 may be used. This has a frame 6 provided with a toe 60 adapted to fit a notch cut in the tree, and a lever 7 pivoted thereon and having a like end-7O adapted to fit another notch in the tree, these being tightened by the action of bolt 71 and hand nut 72. The end section of the frame has a bracket arm '31 which is pivoted at 32 on the frame 6, as is also the aevasee faces of said disks oppositely to each other,

and means for yieldingly pressing said rollers upon the disks.

2. The combination with a chain saw of a driving wheel having disk faces adapted to engage opposite side faces of the saw and relatively movable to grip the saw, a pivoted arm carrying a roller engaging the movable gripping member, and means for applying a yielding pressure to said arm to grip the saw.

3. The combination with a chain saw of a driving wheel having disk faces adapted to engage opposite side faces of the saw and relatively movable to grip the saw, an arm pivoted at each side of said disks to swing toward and from the disks and extending beyond the saw, rollers carried by these arms and'engaging the outer faces of the disks, a rod connecting the outer end of these arms, a nut threading upon said-rod and a spring interposed between the rod and an arm to take the clamping strain.

Signed at Seattle, Washington, this 21st day of November, 1917.

GEORGE MEYER. 

